How far is Seabrook, NH from Merrimack, NH?
The driving distance from Seabrook, NH to Merrimack, NH is about 49.8 miles (80.2 km), with a travel time of about 00h 52m by car.
- The straight-line flight distance is about 31.6 miles (50.8 km).
- For a round trip, plan for roughly 01h 44m of driving time before adding stops, traffic, or weather delays.
- A comfortable departure window is usually 8:00 AM to 10:00 AM EDT.
Reverse, save, or send this route
This route works well as a day trip with time at the destination. Copy the route link, send it to another device, or print a clean version before you head out.
This route works well as a day trip with time at the destination.
Flight Distance
Driving Distance
Gas Cost Calculator
Leave and Arrive Planner
Pick a departure time to see your estimated arrival and same-day return window.
Drive time stays fixed at 00h 52m.
A morning start gives you useful time at the destination and keeps the return out of the late evening.
You are leaving earlier than the recommended window, which gives you extra margin for breaks and traffic.
Halfway Point
A useful midpoint for breaks, coffee, or meeting in the middle.
Town in New Hampshire
Route Weather Snapshot
Check the forecast at both ends before you head out.
Mostly Sunny then Slight Chance Rain Showers
Mostly Sunny
Driving Route Map
The map below follows the saved road route between Seabrook and Merrimack.
Turn-by-Turn Driving Directions
Step-by-step road directions between Seabrook and Merrimack.
-
1
Start on the route
21 m · 7 sec
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2
Turn left onto Lafayette Road
585 ft · 20 sec · Lafayette Road
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3
Turn right
1560 ft · 31 sec
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4
Take the ramp slight right toward I 95 North: Hampton, Portsmouth
1387 ft · 34 sec
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5
Merge slight left onto Blue Star Turnpike
4.1 mi · 5 min · Blue Star Turnpike
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6
Take the exit slight right toward NH 101: Exeter, Hampton, Manchester
3056 ft · 1 min
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7
Continue on NH 101: Exeter, Hampton, Manchester
1 km · 2 min
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8
Keep slight right to continue on 101 West: Manchester, Concord, Exeter
2083 ft · 51 sec
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9
Merge slight left onto Exeter-Hampton Expressway
32.4 mi · 38 min · Exeter-Hampton Expressway
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10
Keep slight right to continue on I 293 North, NH 101 West: Manchester Airport, Manchester, Bedford
3.3 mi · 4 min
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11
Keep slight left to continue on NH 101 West: Bedford, Nashua
2871 ft · 45 sec
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12
Take the exit slight right toward Everett Turnpike South: Merrimack, Nashua, Manchester Airport
1840 ft · 44 sec
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13
Merge slight left onto Everett Turnpike
1.9 mi · 3 min · Everett Turnpike
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14
Take the exit slight right toward Airport
1.3 km · 1 min
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15
Keep slight right to continue on Merrimack
1425 ft · 38 sec
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16
Turn right onto South River Road
704 ft · 13 sec · South River Road
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17
Continue on Daniel Webster Highway
3.8 mi · 8 min · Daniel Webster Highway
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18
Turn slight left onto Loop Road
25 m · 4 sec · Loop Road
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19
Arrive at your destination
0 m · 1 sec · Loop Road
Car Route Details
A richer read on the saved driving route between Seabrook and Merrimack.
Highway-focused drive
Most of the mileage stays on named highways, so the important moments are ramps, exits, merges, and the final local approach.
Exeter-Hampton Expressway
Merge slight left onto Exeter-Hampton Expressway
32.4 mi · 00h 38m
Route Summary
A quick read on whether this route feels easy, ambitious, or worth planning around.
A comfortable day-trip route
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
Mostly Sunny then Slight Chance Rain Showers leaving Seabrook and Mostly Sunny near Merrimack.
Trip Questions
Direct answers travelers usually want before committing to the drive.
How long does it take to drive from Seabrook to Merrimack?
The road trip is about 49.8 miles (80.2 km) and usually takes 00h 52m in normal driving conditions.
Is this a same-day trip or an overnight route?
This route works well as a day trip. You can leave in the morning, spend meaningful time at the destination, and still return the same day.
What is the halfway point on this route?
Raymond is a useful midpoint, sitting about 24.9 miles from Seabrook and 24.9 miles from Merrimack.
How much longer is the road route than the straight-line distance?
The direct path is about 31.6 miles (50.8 km), while the road route adds roughly 18.2 extra miles because roads do not follow the straight air line.
When is the best time to leave for this route?
A good departure window is usually 8:00 AM to 10:00 AM EDT. If you want a more comfortable same-day return, try to leave by 4:46 PM EDT.
How much will gas cost for this route?
Using about 28.3 MPG, regular gas is estimated at $6.94 one way or $13.89 round trip. Estimated CO2 is about 15.6 kg one way.
What should you check before leaving?
Before you leave, expect Mostly Sunny then Slight Chance Rain Showers around Seabrook and Mostly Sunny near Merrimack.
Stop Ideas Near Raymond
Useful break, food, and waypoint ideas within about 15 miles of the route midpoint.
Transit and Meeting Points
Useful pickup, handoff, or rendezvous points close to Raymond.
Exeter station
Durham–UNH station
Manchester, New Hampshire
Haverhill station
Flight Path Map
This map shows the direct air route between Seabrook and Merrimack. Straight-line distance: 31.57 mi (50.81 km).
#1 Seabrook
Town in New Hampshire, United States
| Population | 8,844 |
| Coordinates | 42.8948100, -70.8711600 |
| Altitude | 15 |
| Country | United States |
#2 Merrimack
River in New Hampshire and Massachusetts, United States
| Population | 27,452 |
| Coordinates | 42.8650900, -71.4934000 |
| Altitude | 47 |
| Country | United States |
End: (-71.493333, 42.865106)
Estimated Travel Time
Distance: 80 km by road
| Speed | Time |
|---|---|
| 30 mph (48.3 km/h) | 01h 39m |
| 40 mph (64.37 km/h) | 01h 14m |
| 50 mph (80.47 km/h) | 00h 59m |
| 60 mph (96.56 km/h) | 00h 49m |
| 70 mph (112.65 km/h) | 00h 42m |
| 80 mph (129 km/h) | 00h 37m |
Fuel, Round Trip and CO2
Estimated fuel cost and emissions for this route.
| Fuel | $/gal | One way | Round trip |
|---|---|---|---|
| Regular gas | $3.95 | $6.94 | $13.89 |
| Mid-grade | $4.46 | $7.84 | $15.69 |
| Premium | $4.86 | $8.55 | $17.10 |
| Diesel | $6.00 | $10.55 | $21.11 |
Assumes 8.3 L/100 km (about 28.3 MPG). CO2 is an estimate and varies by vehicle, fuel blend, traffic, and terrain.
Prices in New Hampshire · May 03, 2026
Distance to Other Cities
Planning a road trip? See the full trip guide on Trip.ovh — stops, fuel costs, weather, and departure timing.